The photos show Jaimie Alexander as a sword-wielding Lady Sif riding into battle, extras in Asgardian armor (the telltale horned helmets give them away), an explosion, and creature-like warriors. The earlier assumption was that Bourne Wood is doubling as Svartalfheim, land of the Dark Elves, but now that seems like it's not the case. Check out some of the photos below, and visit the Daily Mail website to see more.